Continuing on, he scampered down into an eight-foot pit and waved to Marcela Milani, a technician working with a thick nail and a hammer. She was chipping away at a rock looking for a missing hip bone believed to be part of Mr. Calvo's most famous discovery, Futalognkosaurus, a new genus of plant-eating dinosaur more than 100 feet long from tail to nose. It is one of the three biggest dinosaurs ever found.
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| ©Joao Pina for The New York Times |
| Museums like El Chocón have sprung up in the past two decades around Neuquén, Argentina. |
